Re: GRUB (stuck on screen)

[Peter Hillier-Brook]

On 04/05/12 00:43, Jordan Uggla wrote:
> On Mon, Apr 30, 2012 at 7:36 PM, Felix Miata<address@hidden>
> wrote:
> > not find the next part. Booting OM or USB sometimes can cause a
> > dumb BIOS to reorganize device boot order, but proper Grub function
> > depends on devices being found as and where they were when Grub was
> > installed.
>
> This is not true at all. GRUB2 makes no assumptions about drive
> enumeration.
>
> It is fairly common that users with multiple drives have two grub
> boot sectors on two different drives, with one of those boot sectors
> corresponding to a working grub version and the other corresponding
> to an old grub installation which has since been broken. In this
> case changing the boot priority in the BIOS can fix the problem by
> getting the BIOS to boot from the drive with a grub boot sector
> corresponding to the working grub installation (sometimes this can be
> a different drive than that which contains /boot/grub/, which often
> confuses people). So while changing the boot priority in the BIOS may
> solve the problem, it wouldn't be for the reason you've given.

Hello Jordan,

you appear to have answered a question I raised on the Ubuntu list, 
namely why is someone modifying my BIOS by altering the boot order of my 
SATA disks.

I have Kubuntu on /dev/sdc and GRUB is installed thereon as my primary 
boot device. I also have Ubuntu on /dev/sdb with an historic 
installation of GRUB that is no longer used (os_prober does the job from 
/dev/sdc). After a dist-upgrade of Ubuntu on /dev/sdb my BIOS boot order 
is modified to point to /dev/sdb as the first device, causing the loss 
of what little hair I have left!

This is not a desirable action and I would like to put an end to it, 
preferably permanently. Have you any advice?

Peter HB